Sorry if it is a dumb question, but is the Load balancer really useful here if control plane decides where it has to get executed? What purpose does the Load balancer server more than acting as a proxy may be?
The load balancer would be to select which groundplex node to submit the initial request to. You don’t want to always point to some specific node, as it may be down at any given point for maintenance, etc. The load balancer would send to one of the groundplex nodes that are actually up and accepting requests.
To provide redundancy across all nodes in the Groundplex when a triggered task is invoked, a load balancer can be placed in front of the Groundplex nodes
Not a problem!
